Changed glMapBufferARB's implementation to return the same ByteBuffer

if the address and capacity of the underlying buffer object haven't
changed. This saves applications the cost of re-slicing the returned
buffer each frame and avoids allocation of one or more finalizable
objects per frame. Moved GlueGen's checking of whether a passed buffer
is direct up into Java from C to be able to handle buffers that wrap
the NULL pointer (needed for the "buffer offsets" used by
ARB_vertex_buffer_object). Ported the VertexArrayRange demo to
VertexBufferObject. Currently slower than VertexArrayRange but needs
to be updated to triangulate the geometry more efficiently (currently
the triangle strips are only 48 vertices long) and to move the indices
into fast RAM.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@47 232f8b59-042b-4e1e-8c03-345bb8c30851

6 files changed, 92 insertions, 17 deletions

diff --git a/src/net/java/games/gluegen/CMethodBindingEmitter.java b/src/net/java/games/gluegen/CMethodBindingEmitter.java
index 763fe6695..27df36cea 100644
--- a/src/net/java/games/gluegen/CMethodBindingEmitter.java
+++ b/src/net/java/games/gluegen/CMethodBindingEmitter.java
@@ -1205,20 +1205,6 @@ public class CMethodBindingEmitter extends FunctionEmitter
     writer.print(incomingArgumentName);
     writer.println(");");
           
-    writer.print("    if (");
-    writer.print(cVariableName);
-    writer.println(" == NULL) {");
-    writer.println("      (*env)->ThrowNew(env, (*env)->FindClass(env, \"java/lang/RuntimeException\"),");
-    writer.print  ("                       \"Argument \\\"");
-    writer.print(incomingArgumentName);
-    writer.println("\\\" was not a direct buffer\");");
-    writer.print  ("      return");
-    if (!binding.getJavaReturnType().isVoid()) {
-      writer.print(" 0");
-    }
-    writer.println(";");
-    writer.println("    }");
-
     if (EMIT_NULL_CHECKS) {
       writer.println("  }");
     }
diff --git a/src/net/java/games/gluegen/CodeGenUtils.java b/src/net/java/games/gluegen/CodeGenUtils.java
index 313896d13..d982f2390 100644
--- a/src/net/java/games/gluegen/CodeGenUtils.java
+++ b/src/net/java/games/gluegen/CodeGenUtils.java
@@ -94,6 +94,7 @@ public class CodeGenUtils
       w.print(imports[i]);
       w.println(';');
     }
+    w.println("import net.java.games.gluegen.runtime.*;");
 
     w.println();
 
diff --git a/src/net/java/games/gluegen/JavaMethodBindingImplEmitter.java b/src/net/java/games/gluegen/JavaMethodBindingImplEmitter.java
index 2ec2723bd..78a4a6ced 100644
--- a/src/net/java/games/gluegen/JavaMethodBindingImplEmitter.java
+++ b/src/net/java/games/gluegen/JavaMethodBindingImplEmitter.java
@@ -89,10 +89,10 @@ public class JavaMethodBindingImplEmitter extends JavaMethodBindingEmitter
   }
 
   protected void emitPreCallSetup(MethodBinding binding, PrintWriter writer) {
-    emitArrayLengthChecks(binding, writer);
+    emitArrayLengthAndNIOBufferChecks(binding, writer);
   }
 
-  protected void emitArrayLengthChecks(MethodBinding binding, PrintWriter writer) {
+  protected void emitArrayLengthAndNIOBufferChecks(MethodBinding binding, PrintWriter writer) {
     // Check lengths of any incoming arrays if necessary
     for (int i = 0; i < binding.getNumArguments(); i++) {
       Type type = binding.getCArgumentType(i);
@@ -101,6 +101,12 @@ public class JavaMethodBindingImplEmitter extends JavaMethodBindingEmitter
         writer.println("    if (" + binding.getArgumentName(i) + ".length < " + arrayType.getLength() + ")");
         writer.println("      throw new " + getRuntimeExceptionType() + "(\"Length of array \\\"" + binding.getArgumentName(i) +
                        "\\\" was less than the required " + arrayType.getLength() + "\");");
+      } else {
+        if (binding.getJavaArgumentType(i).isNIOBuffer()) {
+          writer.println("    if (!BufferFactory.isDirect(" + binding.getArgumentName(i) + "))");
+          writer.println("      throw new " + getRuntimeExceptionType() + "(\"Argument \\\"" +
+                         binding.getArgumentName(i) + "\\\" was not a direct buffer\");");
+        }
       }
     }
   }
diff --git a/src/net/java/games/gluegen/MethodBinding.java b/src/net/java/games/gluegen/MethodBinding.java
index b8f0eefdf..af86f0b66 100644
--- a/src/net/java/games/gluegen/MethodBinding.java
+++ b/src/net/java/games/gluegen/MethodBinding.java
@@ -184,8 +184,10 @@ public class MethodBinding {
           JavaType javaArgType = getJavaArgumentType(i);
           Type cArgType = getCArgumentType(i);
           if (javaArgType.isCompoundTypeWrapper() ||
+              javaArgType.isNIOBuffer() ||
               cArgType.isArray()) {
-            // Needs unwrapping of accessors or checking of array lengths
+            // Needs unwrapping of accessors, checking of array
+            // lengths, or checking of direct buffer property
             needsBody = true;
             break;
           }
diff --git a/src/net/java/games/gluegen/runtime/BufferFactory.java b/src/net/java/games/gluegen/runtime/BufferFactory.java
index 2efb78ca6..67ffea1d8 100644
--- a/src/net/java/games/gluegen/runtime/BufferFactory.java
+++ b/src/net/java/games/gluegen/runtime/BufferFactory.java
@@ -47,4 +47,29 @@ public class BufferFactory {
     buf.order(ByteOrder.nativeOrder());
     return buf;
   }
+
+  /** Helper routine to tell whether a buffer is direct or not. Null
+      pointers are considered direct. isDirect() should really be
+      public in Buffer and not replicated in all subclasses. */
+  public static boolean isDirect(Buffer buf) {
+    if (buf == null) {
+      return true;
+    }
+    if (buf instanceof ByteBuffer) {
+      return ((ByteBuffer) buf).isDirect();
+    } else if (buf instanceof FloatBuffer) {
+      return ((FloatBuffer) buf).isDirect();
+    } else if (buf instanceof DoubleBuffer) {
+      return ((DoubleBuffer) buf).isDirect();
+    } else if (buf instanceof CharBuffer) {
+      return ((CharBuffer) buf).isDirect();
+    } else if (buf instanceof ShortBuffer) {
+      return ((ShortBuffer) buf).isDirect();
+    } else if (buf instanceof IntBuffer) {
+      return ((IntBuffer) buf).isDirect();
+    } else if (buf instanceof LongBuffer) {
+      return ((LongBuffer) buf).isDirect();
+    }
+    throw new RuntimeException("Unknown buffer type " + buf.getClass().getName());
+  }
 }
diff --git a/src/net/java/games/jogl/impl/InternalBufferUtils.java b/src/net/java/games/jogl/impl/InternalBufferUtils.java
new file mode 100644
index 000000000..707ebbe93
--- /dev/null
+++ b/src/net/java/games/jogl/impl/InternalBufferUtils.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistribution in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * 
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * 
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ * 
+ * Sun gratefully acknowledges that this software was originally authored
+ * and developed by Kenneth Bradley Russell and Christopher John Kline.
+ */
+
+package net.java.games.jogl.impl;
+
+import java.nio.*;
+
+/** Utility routines available only to the JOGL implementation. */
+
+public class InternalBufferUtils {
+  /** Allocates a new direct byte buffer at the given address with the
+      given capacity. This is exposed only because of glMapBufferARB
+      and its semantics; it is undesirable to allocate a new buffer
+      every frame because (a) ByteBuffers are finalizable and (b) the
+      application would typically need to re-slice the buffer every
+      frame. Instead we cache these ByteBuffer objects up in Java and
+      look them up in a HashMap by base address and capacity. */
+  public static native ByteBuffer newDirectByteBuffer(long address, int capacity);
+}